Nível de proteína bruta e balanço de aminoácidos essenciais da ração pré-inicial (1 a 7 dias) de pintos de corte
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Data
2002-06
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Editor
José Henrique Stringhini
Resumo
Two experiments were carried out in order to evaluate
performance, nitrogen and dry matter balances and
biometrical measures of broiler chicks fed different levels of
crude protein (20.0; 21.4; 23.1; and 25.1%), and essential
amino acids Lys and Met+Cys (100:76; 100:69, 100:63, and
100:58) on pre-starter phase (1-7d). In each experiment, 200
one-day-old broiler chicks were allotted in a completely
randomized design with five treatment groups and four
replicates of 10 birds each one. No significant differences
were observed for weight, weight gain, feed consumption
and feed conversion at 7, 14 and 21 experimental days when
the treatments were protein levels. The chicks fed 100 Lys:76
Met+Cys ration showed higher weight, weight gain and feed
conversion than those fed 100:69, 100:63 and 100:58 amino
acid balance, but not at 14 and 21 d. The best digestibility of
dry matter and nitrogen were achieved when the ration
contained the lower level of protein (20%) and the higher
balance of amino acids (100:76). The relative weight of the
liver was higher at´7d with the use of 20 and 21.4% crude
protein and 100:76 amino acids in the pre-starter ration. The
pancreas relative weight was higher for 7-d-old birds fed
20% crude protein. The results are indicative that increasing
proteins levels of pre-starter ration are not a good alternative
to improve broiler chick performance, but the formulation
could be balanced on the requirements and ideal relationship
among essential amino acids, manly Met, Cys and Lys.
Descrição
Palavras-chave
Biometria, Desempenho, Digestibilidade, Frango de corte, Ração pré-inicial, Broiler, Biometrical, Digestibility, Pre-starter ration, Performance
Citação
STRINGHINI, José Henrique; ANDRADE, Michelle Lobo; ROSA, Roberta Martins; ANDRADE, Maria Auxiliadora; Leandro, Nadja Susana Mogyca; CAFÉ, Marcos Barcellos; GONZALES, Elisabeth. Nível de proteína bruta e balanço de aminoácidos essenciais da ração pré-inicial (1 a 7 dias) de pintos de corte. Ciência Animal Brasileira, Goiânia, v. 3, n. 1, p. 21-30, jan./jun. 2002. Disponível em: <https://www.revistas.ufg.br/vet/article/view/276/247>.